黏弹性阻尼器大变形性能试验研究
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摘要
通过对黏弹性阻尼器缩尺试件进行不同应变幅值、加载频率和环境温度下的基本力学性能试验、老化性能试验以及低周、高周疲劳性能试验,研究试件在不同工况下的剪切存储模量、剪切损失模量和损耗因子等力学参数,及其力学性能的变化规律。其中,力学性能试验的应变幅值100%～420%;低周疲劳试验最大应变达300%。试验结果表明:黏弹性阻尼器力学性能与加载频率相关性较小,与温度相关性相对明显,随应变幅值的增加阻尼器表现出软化特征,但其损耗因子始终保持在比较高的水平;阻尼器在小位移和大位移下都有稳定耗能能力,可用于风振控制和地震响应控制;阻尼器表现出良好的变形能力,在200%大应变下仍保持稳定的力学性能,应变420%时仍未破坏。
This paper mainly presents an experimental study on a new type viscoelastic damper,with better energy dissipation capacity and stability.Shear storage modulus,shear loss modulus and loss factor were measured under different loading schemes,to study the variation of the viscoelastic damper properties.The tests used reduced scale specimens.Displacement control and sinusoidal loading schemes were used.The mechanical properties of the damper for various strain amplitudes,loading frequencies and ambient temperatures were investigated.Aging tests,low cycle and high cycle fatigue tests were also conducted.Particularly,the low cycle fatigue property under a strain of 300% and mechanical properties under strains of 100% to 420% were investigated.Experimental results show that the dependency of the damper's mechanical properties on frequency is small,while that on temperature is relatively significant.The energy dissipation capacity is stable under both large and small displacements,which means the damper can be used both for wind vibration control and earthquake resistance.It is also found that the damper exhibits stable behavior under strain of 200%,and does not fail under the strain of 420%.
This paper mainly presents an experimental study on a new type viscoelastic damper,with better energy dissipation capacity and stability.Shear storage modulus,shear loss modulus and loss factor were measured under different loading schemes,to study the variation of the viscoelastic damper properties.The tests used reduced scale specimens.Displacement control and sinusoidal loading schemes were used.The mechanical properties of the damper for various strain amplitudes,loading frequencies and ambient temperatures were investigated.Aging tests,low cycle and high cycle fatigue tests were also conducted.Particularly,the low cycle fatigue property under a strain of 300% and mechanical properties under strains of 100% to 420% were investigated.Experimental results show that the dependency of the damper's mechanical properties on frequency is small,while that on temperature is relatively significant.The energy dissipation capacity is stable under both large and small displacements,which means the damper can be used both for wind vibration control and earthquake resistance.It is also found that the damper exhibits stable behavior under strain of 200%,and does not fail under the strain of 420%.
引文
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[3]Chang K C,Song T T,Oh S T,Lai M L.Effect ofambient temperature on viscoelastically dampedstructures[J].Structure Engineering,1992,118(7):1955-1973.
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[5]吴波,郭安薪.黏弹性阻尼器的性能研究[J].地震工程与工程震动,1998,18(2):108-116.(Wu Bo,Guo Anxin.Study on properties of viscoelastic dampers[J].Earthquake Engineering and EngineeringVibration,1998,18(2):108-116.(in Chinese))
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[9]苏毅,常业军,程文瀼.筒式黏弹性阻尼器的试验研究及工程应用[J].振动与冲击,2009,28(11):177-182.(Su Yi,Chang Yejun,Cheng Wenrang.Experimental study and engineering application of tube-like viscoelastic damper[J].Journal of Vibration andShock,2009,28(11):177-182.(in Chinese))
[10]周云,徐昕,邹征敏,吴从晓,邓雪松.扇形铅黏弹性阻尼器的设计及数值仿真分析[J].土木工程与管理学报,2011,28(2):1-6.(Zhou Yun,Xu Xin,ZouZhengmin,Wu Congxiao,Deng Xuesong.Design andnumerical simulation analysis of sector lead viscoelasticdamper[J].Journal of Civil Engineering andManagement,2011,28(2):1-6.(in Chinese))
[11]周云,吴从晓,邓雪松.铅黏弹性阻尼器的开发、研究与应用[C]//第18届全国结构工程学术会议.北京:中国力学学会,2011:233-245.(Zhou Yun,WuCongxiao,Deng Xuesong.Development,research andapplication of lead viscoelastic damper[C]//18thNational Conference on Structural Engineering.Beijing:Chinese Society of Theoretical and Applied Mechanics,2011:233-245.(in Chinese))
[12]Lai M L,Lu P,Lunsford D A,Kasai K,Chang K C.Viscoelastic damper:a damper with linear or nonlinearmaterial[C]//7th World Conference on EarthquakeEngineering.Oxford:Elsevier Science Ltd,1996:795.
[2]Chang K C,Soong T T,Oh S T,Lai M L.Effectambient temperature on seismic response of 2/5 scalesteel structure with added viscoelastic dampers[R].Technical Report NCEER 91-0012.Buffalo NY:National Center for Earthquake Engineering Research,1991:1955-1973.
[3]Chang K C,Song T T,Oh S T,Lai M L.Effect ofambient temperature on viscoelastically dampedstructures[J].Structure Engineering,1992,118(7):1955-1973.
[4]Kazuhiko Kasai,Hiroshi Ito,Yoji Ooki,et al.Full-scale shake table tests of 5-story steel building withvarious dampers[C]//The 7th InternationalConference on Urban Earthquake Engineering&5thInternational Conference on Earthquake Enginnering.Tokyo,Japan:Tokyo Institute of Technology,2010:11-22.
[5]吴波,郭安薪.黏弹性阻尼器的性能研究[J].地震工程与工程震动,1998,18(2):108-116.(Wu Bo,Guo Anxin.Study on properties of viscoelastic dampers[J].Earthquake Engineering and EngineeringVibration,1998,18(2):108-116.(in Chinese))
[6]隋杰英,程文瀼,常业军.黏弹性阻尼器耐久性试验研究[J].工业建筑,2006,36(2):5-7.(SuiJieying,Cheng Wenrang,Chang Yejun.Experimentalresearch on the durability of viscoelastic dampers[J].Industrial Construction,2006,36(2):5-7.(in Chinese))
[7]欧进萍,邹向阳.黏弹性耗能器的性能试验研究[J].振动与冲击,1999,18(3):12-18.(Ou Jinping,Zou Xiangyang.Experimental study on properties ofviscoelastic dampers[J].Journal of Vibration andShock,1999,18(3):12-18.(in Chinese))
[8]周云,徐赵东,邓雪松.黏弹性阻尼器的性能试验研究[J].震动与冲击,2001,21(3):71-75.(ZhouYun,Xu Zhaodong,Deng Xuesong.Experimentalstudy on properties of viscoelastic dampers[J].Journalof Vibration and Shock,2001,20(3):71-75.(inChinese))
[9]苏毅,常业军,程文瀼.筒式黏弹性阻尼器的试验研究及工程应用[J].振动与冲击,2009,28(11):177-182.(Su Yi,Chang Yejun,Cheng Wenrang.Experimental study and engineering application of tube-like viscoelastic damper[J].Journal of Vibration andShock,2009,28(11):177-182.(in Chinese))
[10]周云,徐昕,邹征敏,吴从晓,邓雪松.扇形铅黏弹性阻尼器的设计及数值仿真分析[J].土木工程与管理学报,2011,28(2):1-6.(Zhou Yun,Xu Xin,ZouZhengmin,Wu Congxiao,Deng Xuesong.Design andnumerical simulation analysis of sector lead viscoelasticdamper[J].Journal of Civil Engineering andManagement,2011,28(2):1-6.(in Chinese))
[11]周云,吴从晓,邓雪松.铅黏弹性阻尼器的开发、研究与应用[C]//第18届全国结构工程学术会议.北京:中国力学学会,2011:233-245.(Zhou Yun,WuCongxiao,Deng Xuesong.Development,research andapplication of lead viscoelastic damper[C]//18thNational Conference on Structural Engineering.Beijing:Chinese Society of Theoretical and Applied Mechanics,2011:233-245.(in Chinese))
[12]Lai M L,Lu P,Lunsford D A,Kasai K,Chang K C.Viscoelastic damper:a damper with linear or nonlinearmaterial[C]//7th World Conference on EarthquakeEngineering.Oxford:Elsevier Science Ltd,1996:795.
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